Novel Systems for Selective Cation Detection: Application of a Lipophilic Carborane Anion in Polymeric Ion-Selective Electrodes

Abstract

Selectivity and sensitivity of PVC membrane electrode are dramatically influenced not only by the specific receptor, but also, mainly for neutral ionophores, by additional lipophilic co-receptor. For cation detection, tetraphenylborate derivatives have been commonly used. Here, we describe novel systems based on conjunction of the classic cation receptors and a highly lipophilic cobalticarborane anionic species. The superiority of this novel co-receptor is demonstrated by application of dibenzo-18-crown-6 and dicyclohexano-18-crown-6 as ionophores in conjunction with the classic lipophilic additive and the novel additive cobalticarborane. The presented data show much higher efficiency which makes this additive co-receptor ideal for cation detection and development of novel sensors.

Potentiometric Response Characteristics of Membrane-BasedCs+-Selective Electrodes Containing Ionophore-Functionalized Polymeric Microspheres

“…In both cases, electrodes demonstrated Nernstian behavior with no unfavorable response characteristics. Previously, cobalticarborane derivatives have been used as ion exchangers [31] and ionophores [32] in liquid-contact and solid-contact ISEs, respectively; however this work demonstrates, for the first time, the suitability of metallacarborane derivatives as charged ionophores for liquid-contact membrane-based electrodes. Attempts to evaluate the performance of CCbased electrodes containing the anion exchanger tridodecylmethylammonium chloride were unsuccessful due to its incompatibility with CC.…”

Application of the cobaltabisdicarbollide anion to the development of ion selective PVC membrane electrodes for tuberculosis drug analysis

“…[1] has been used to produce very stable polypyrrole solid contacts in ISEs, 7,8 as a doping agent in intelligent membranes for ion capture, 10 and also as a lipophilic anionic additive. 9 Closo-boranes are lipophilic, have a bulky size (nearly 1 nm in diameter) and sufficient charge delocalization to produce very weak ion pairs. 11 Notwithstanding this, Cc-HÁ Á ÁH-B and B-HÁ Á ÁH-N dihydrogen bonds, and Cc-HÁ Á ÁO hydrogen bonds, in which Cc stands for the cluster carbon atom, are commonly encountered in crystal structures as found in an inspection of the Cambridge Structural Database (CSD).…”

Nanostructured Surface and Antimicrobial Properties of Chemically Modified Polymer Foils

“…The nature of this unique molecule previously allowed to a design of new potential agents for the extraction of fission products, ion‐selective polymer electrodes, HPLC hydrophobic stationary phases, doping agents in conducting polymers, sensitized solar‐cells, redox potential chemical indicators and especially the highly selective antivirotics and antimicrobial agents …”